PeteHski

I recently did a 2 week test with a glucose monitor and my responses were completely normal.

RH Clark

How often do you ride in such a manner that you add 50 g carbs an hour? Were you adding that much while you were testing?

PeteHski

Not that often in the big picture. Basically only when riding at full race pace. I typically do half a dozen endurance events per year, which are mostly timed centuries on hilly or mountainous terrain. Most of my training rides are in Z2, where I consume far less carbs. I ramp up my carb intake as required with intensity. If I do a really hard Zwift race I will also consume heavy carbs if the race is more than 90 mins. I can burn some serious calories on those, averaging close to 300W for a couple of hours.

I do little or no carb loading in the lead up to an event. I just eat normally and make sure I am well hydrated.

I did a couple of high intensity rides while wearing the glucose monitor and the only spike I got was at the very end when I stopped. It was back to normal within a couple of hours. A bit like having a normal meal.

Jughed

Yesterday I rode my first timed Fondo - 60 miles with 5k of climbing. My plan was to go full gas gate to gate. All 5k came from short/steep climbs. Up and down all day.

Carb loaded before the ride, 40-60 grams per hour during the ride, and a full recovery meal after the ride.

Riding without carbs allows me to ride sub threshold - Z2 with low Z3 all day. Z4/Z5+ and I blow up.

With the carb loading, I was able to maintain Z3 on the flats, threshold+/- on any climbs of a 1/2 mile or so, and VO2+ on the 1/8-1/4 mile ramps. Some of early the climbs were repeated at the end of the ride and I actually did them faster the second time. Finished strong, and recovered well...

This would never happen for me on my typical low carb diet.